Impervious area definition

Impervious area means any surface that does not allow stormwater to infiltrate into the ground.

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Impervious area means that part of the lot which is already covered or is to be covered by any impermeable artificial surface but excludes any impervious areas created without a building or resource consent.

Impervious area means the number of square feet of hard surfaced areas which either prevent or retard the entry of water into soil mantle, as it entered under natural conditions as undisturbed property, and/or causes water to run off the surface in greater quantities or at an increased rate of flow from that present under natural conditions as undisturbed property, including, but not limited to, roofs, roof extensions, patios, porches, driveway, sidewalks, pavement and athletic courts.

Examples of Impervious area in a sentence

Impervious area is the most important factor influencing stormwater runoff and is therefore a major element in each method.
Impervious area for each land use is calculated based on the tributary area and an assumed impervious fraction for the given land use (see Table 1 for example impervious fraction assumptions for a selection of land uses).
The following summary of proposed land uses shall govern this project: Total footprint 1.2 acres Total building area 143,920 SF Interior Plaza area 1.09 acres Impervious area 66.19% Landscape/open space/storm retention 33.81% *No more than 50% of the Landscape/Open Space/Storm Retention Area shall be developed as a normally wet pond From this summary, it is seen that the total landscape/open area of the project is at least 33.81% of the total project area.
Impervious area for each land LMRWMO JPA Exhibit C use is calculated based on the tributary area and an assumed impervious fraction for the given land use (see Table 1 for example impervious fraction assumptions for a selection of land uses).

More Definitions of Impervious area

Impervious area means the portion of a parcel of property that is covered by any material, including without limitation roofs, streets, sidewalks and parking lots paved with asphalt, concrete, compacted sand, compacted gravel or clay, that substantially reduces or prevents the infiltration of storm water. Impervious area shall not include natural undisturbed surface rock."

Impervious area means any surface that does not allow storm water to infiltrate into the ground. Consistent with the Maryland Critical Area Commission, it also means human-made surfaces that are not vegetated will be considered impervious. Impervious surfaces include roof tops, roads, parking lots, driveways and other surfaces which no longer allow rainfall to soak into the ground.

Impervious area means impermeable surfaces, such as pavement or rooftops, which prevent the infiltration of stormwater and urban runoff into the ground.

Impervious area means an area or surface which prevents or limits the entrance or passage of stormwater, including asphalt, concrete, bricks, roofs and gravel surfaces if they are hard packed, and all of which are denoted as impervious by the satellite imagery utilized by the Commission in that determination;

Impervious area means an area which either prevents or retards the entry of water into the soil mantle. Common Impervious Areas include, but are not limited to, rooftops, sidewalks, walkways, patio areas, driveways, parking lots, storage areas and other surfaces which similarly impact infiltration and runoff. Roads and their related right of ways, and waterbodies and their related easements shall not be considered Impervious Areas.

Impervious area means the area of the premises that is impervious to rainfall or overland flow, including areas of the premises covered by compacted gravel.

Impervious area means any surface that does not allow stormwater to infiltrate into the ground, including any area that is paved or used for vehicular storage or traffic, building rooftops, sidewalks, driveways, etc.